Multiple-stratum-series tight sandstone gas reservoir well spacing method

A tight sandstone, multi-layer technology, applied in earthwork drilling, wellbore/well components, production fluids, etc., to ensure successful drilling, saving time, and reasonable well layout methods

Inactive Publication Date: 2015-03-25
中国石油天然气股份有限公司长庆油田分公司勘探开发研究院
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Problems solved by technology

Therefore, the above-mentioned different technologies have professional difficulties and limitations.

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  • Multiple-stratum-series tight sandstone gas reservoir well spacing method

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Embodiment Construction

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0037] see figure 1 , a multi-layer tight sandstone gas reservoir well layout method, comprising the following steps:

[0038] Step (1) Based on high-resolution sequence stratigraphy, describe the distribution of sand bodies, combine seismic and logging techniques, predict effective reservoirs, and optimize enrichment areas;

[0039] A. According to the geological characteristics of the reservoir, select the upper and lower isochrones, and must establish a high-resolution sequence stratigraphic framework around the time when the Caledonian tectonic movement ended and the Hercynian movement started. According to the sedimentary structure, sedimentary form, Sand body superimposition mode, sand-mud ratio characteristics, accommodating space mec...

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Abstract

The invention discloses a multiple-stratum-series tight sandstone gas reservoir well spacing method. The method includes the following steps that first, based on high-resolution sequence stratigraphy, distribution of sand bodies is depicted, an effective reservoir stratum is predicted through the earthquake and well logging technology, and an enrichment region is preferentially selected; second, based on a favorable region, a longitudinal structure of the sand bodies is fine dissected through the geology and well logging technology, and therefore the horizontal distribution law of the sand bodies can be researched; third, in the preferential favorable region, well spacing is performed according to conditions. The well spacing method is reasonable and takes the complex geology that multiple gas-bearing series longitudinally develop in an upper palaeozoic tight sandstone gas reservoir, the single layer yield is low and the lateral variety of the reservoir stratum is fast into consideration, the drilling success of a development well can be guaranteed, the development effect can be improved to the maximum extent, and the economical and effective development of the tight sandstone gas reservoir is achieved.

Description

technical field [0001] The invention relates to the field of natural gas exploitation, in particular to a well layout method for multi-layered tight sandstone gas reservoirs. Background technique [0002] There is no mature well deployment technology for multi-layer tight sandstone gas reservoirs at home and abroad. Most of the existing well deployment technologies are aimed at structural oil and gas reservoirs. There is no new well deployment technology for multi-layer tight sandstone gas reservoirs. research methods and results. [0003] Multi-layered tight sandstone gas reservoirs develop multiple sets of gas-bearing formations, but the dominant reservoirs are not prominent, and the single-layer production is low; lateral reservoirs change rapidly and have strong heterogeneity, making economical and effective development difficult. Because the depositional period of tight sandstone gas reservoirs is controlled by the sea-continental alternation and transitional complex p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/30
CPCE21B43/30
Inventor 冯永玖杨勇孙素芳黄有根张雅玲唐乐平安文宏史婵媛刘志军焦延奎冯渊冯炎松汪淑洁王蕾蕾王京舰左海龙付晓燕胡薇薇刘道天郝龙
Owner 中国石油天然气股份有限公司长庆油田分公司勘探开发研究院
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